Hi,
I have limited experience, just relocated mine years ago, so read with a pinch of salt. The plastic housing has an upper 1/3 and a lower 2/3 part and the motor is sealed in it. The hydraulic lines run under the lower part so it has to come out too. Therefore opening the case in situ is not necessary. The housing has a plastic tab on its side that has to break - by wrencing the housing. Mine had also two white cable ties from factory, which I cut using scissors (with an usb camera taped on).